Development of the lateral musculature in the teleost, <i>Brachydanio rerio</i>: A fine structural study

Waterman, Robert E.

doi:10.1002/aja.1001250406

Cited by 162 publications

(114 citation statements)

References 32 publications

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“…They suggested that as in the amniotes, such cells could originate from the dermomyotome, which have now been proved to also exist in fish in the form of the socalled external cell layer. An external cell origin of the new slow muscle fibres emerging from the lateral surface next to the lateral line nerve was supposed by several authors in different fish species as Danio rerio (Waterman, 1969), Clupea harengus (Linnaeus) (Johnston, 1993), Dicentrarchus labrax (Linnaeus) and Sparus aurata (Linnaeus) (Veggetti et al, 1990;López-Albors et al, 1998). As seen in other fish (Scapolo et al, 1988;Mascarello et al, 1995;Patruno et al, 1998), the appearance of those fibres coincided with the first attempts of the larvae at cruise swimming in search for food, and may be an important factor in larval survival at that age.…”

Section: Larvae Aged 0 (Hatching)-40 Daysmentioning

confidence: 96%

Muscle differentiation in blackspot seabream (Pagellus bogaraveo, Brunnich): Histochemical and immunohistochemical study of the fibre types

Silva¹,

Rowlerson²,

Valente³

et al. 2008

Tissue and Cell

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The aim of this work was to gain insights into the mechanism of muscle differentiation and growth in Pagellus bogaraveo, by studying muscle fibre phenotypes identified by immunohistochemistry. At hatching, several layers of deep fast-white fibres were covered by a superficial fibre monolayer. At 5 days, slow-red fibres appeared near the lateral line nerve. At 40 days, the intermediate-pink muscle became visible, and in the slow-red and fast-white muscle layers transitions from larval myosin isoforms to the isoforms typical of adult muscle occurred. Between 70 and 100 days, small fibres with a distinct ATPase profile appeared throughout the fast-white muscle, marking the onset of "mosaic" hyperplasia. The myosin of the original superficial monolayer fibres underwent two myosin transformations, before being slowly replaced by an adult slow-red isoform. In juveniles and adults, the slow-red muscle layer could be resolved into two distinct types. The analysis of fibre phenotypes indicated that post-larval muscle growth occurred by two distinct stages of hyperplasia. This study offers a basis for further comparative and experimental studies with this economically relevant species, namely for identifying factors influencing its muscle growth dynamics and disclosing underlying mechanisms.

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Section: Larvae Aged 0 (Hatching)-40 Daysmentioning

confidence: 96%

Muscle differentiation in blackspot seabream (Pagellus bogaraveo, Brunnich): Histochemical and immunohistochemical study of the fibre types

Silva¹,

Rowlerson²,

Valente³

et al. 2008

Tissue and Cell

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“…Located at the distal end of the common pathway and defining the nascent horizontal myoseptum, muscle pioneers are distinguishable from other somitic cells as the first to express muscle-specific characteristics (Waterman, 1969;van Raamsdonk et al, 1974;Myers et al, 1986;Felsenfeld et al, 1991;Hatta et al, 1991a) and assemble elements necessary for functional neuromuscular activity Hanneman and Westerfield, 1989;Westerfield, 1990, 1992). Zebrafish muscle pioneers fulfill criteria distinguishing guidepost cells in grasshoppers (for review, see Jellies, 1990;Palka et al, 1992) and intermediate targets in the rat CNS (Bovolenta and Dodd, 1990), mouse optic chiasm (Sretavan et al, 1995), and chick hindlimb plexus (Lance-Jones and Dias, 1991).…”

Section: Abstract: Acetylcholine Receptors; Neuromuscular Junctions;mentioning

confidence: 99%

Pathfinding by Identified Zebrafish Motoneurons in the Absence of Muscle Pioneers

et al. 1997

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To identify the cellular cues that guide zebrafish neuronal growth cones to their targets, we examined interactions between identified motor growth cones and identified muscle fibers and tested whether these fibers were required for growth cone navigation. Caudal primary motoneurons (CaPs) and middle primary motoneurons (MiPs) are identified motoneurons that innervate cell-specific regions of the myotome. Growth cones of both cells initially extend along a common pathway and then pause at a set of identified muscle fibers, called muscle pioneers, before diverging along cell-specific pathways. Muscle pioneers are intermediate targets of both CaP and MiP Liu and Westerfield, 1990); both motoneurons extend their growth cones directly to the muscle pioneers on which the first functional neuromuscular contacts form, suggesting that muscle pioneers may provide guidance information to these growth cones. We tested this idea by ablating muscle pioneers and observing the resulting motor axonal trajectories. Both CaP and MiP ultimately formed normal axonal arbors after muscle pioneer ablation, showing that muscle pioneers are unnecessary for formation of correct axonal trajectories; however, although final cellular morphology was correct in the absence of muscle pioneers, MiP growth cones branched abnormally or extended ventrally beyond the common pathway. Ablation of CaP and the muscle pioneers together increased the aberrant behavior of the MiP growth cone. Our results provide evidence that an intermediate target, the muscle pioneers, affects motor axonal extension without altering target choice, suggesting that other cues also contribute to proper pathway navigation. Key words: acetylcholine receptors; neuromuscular junctions; axogenesis; zebrafish motoneurons; muscle pioneers; pathway navigationThe environment through which growth cones navigate contains cues that regulate neuronal pathfinding (Frank and Wenner, 1993;Goodman and Shatz, 1993;Keynes and Cook, 1995). En route to their synaptic targets, neurons may project axons to intermediate targets that influence subsequent pathway choice . For example, some grasshopper pioneer neurons project to guidepost cells (Bentley and Keshishian, 1982) that are required for normal pathfinding (Bentley and Caudy, 1983). Chick hindlimb motoneurons (Lance-Jones and Landmesser, 1981; Tosney and Landmesser, 1985a,b;Landmesser, 1992) and spinal commissural neurons (Bovolenta and Dodd, 1991) also project to specific intermediate targets, which appear to influence extension. These results suggest that intermediate targets serve as choice points for pathway selection.We examined the role of potential intermediate targets in the pathway choices of zebrafish primary motoneurons. We focused on the first two primary motoneurons to extend growth cones out of the spinal cord: C aP and MiP (see Fig. 1) Myers et al., 1986). The C aP growth cone pioneers a common pathway to the nascent horizontal myoseptum, where it pauses before selecting its cell-specific pathway along ventral myotome Myers e...

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“…Each layer is several muscle fibers thick. The red muscle is confined to a narrow region at the lateral edge of the segment, as described previously by Waterman (1969).…”

Section: Muscle Anatomymentioning

confidence: 99%

Identified motoneurons and their innervation of axial muscles in the zebrafish

Westerfield¹,

McMurray²,

Eisen³

1986

J. Neurosci.

304

250

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The organization of spinal cord motoneurons and their innervation of axial (white) muscles in the zebrafish were studied. Motoneurons can be divided into 2 classes, primary and secondary, on the basis of their cell-body sizes and positions. Each side of each spinal segment contains 3 primary motoneurons that are uniquely identifiable as individuals by their stereotyped cell-body positions and peripheral branching patterns. Moreover, these motoneurons precisely innervate cell-specific subsets of contiguous muscle fibers in mutually exclusive regions of their own body segment. Individual muscle fibers receive inputs from a single primary motoneuron and, in addition, from up to 3 secondary motoneurons. The results demonstrate that the precision of innervation previously described in invertebrates is also present in some vertebrates.

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Development of the lateral musculature in the teleost, Brachydanio rerio: A fine structural study

Cited by 162 publications

References 32 publications

Muscle differentiation in blackspot seabream (Pagellus bogaraveo, Brunnich): Histochemical and immunohistochemical study of the fibre types

Muscle differentiation in blackspot seabream (Pagellus bogaraveo, Brunnich): Histochemical and immunohistochemical study of the fibre types

Pathfinding by Identified Zebrafish Motoneurons in the Absence of Muscle Pioneers

Identified motoneurons and their innervation of axial muscles in the zebrafish

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